Whether the use and storage method of the casing is appropriate is also very important for the function of the casing. The storage environment of the casing is generally required to be stored in a dry, ventilated and dark place below 25°C. How to use it according to the method recommended by the casing factory. Improper use can adversely affect the quality of sausages. ①The casing is bruised before or during use. In severe cases, the casing will burst during the enema process. In light cases, the barrier property of the sausage will be reduced due to the destruction of the casing structure during the storage or sale of the sausage, and the sausage will be oxidized and deteriorated in advance. Entering the sausage will cause the sausage to spoil and lose its edible value. ②Storing the casing under high temperature and humidity will cause the sausage to be deformed, the shrinkage rate will decrease, and the specifications will change. ③ Long-term storage of casings, due to incomplete storage conditions, will deform the casings and cause losses. The general recommended storage period is 3 months.